</font><font color="blue" class="small">( 6 foot scraper blade and have 3 of the 35 lbs suitcase weights ... So thought I would put the blade on and put the 105 lbs on it, and between the two, it would be enough. Of course when bush hoging, I would have the bush hog on it. )</font>
That sounds good. It took me some time to realize what everyone had written before - if I used the loader with no implement on the back, it steered hard (no PS) and could bury the front tires in ruts crossing wet ground(2wd). I loaded the rear tires with water which added a lot of rollover stability and traction for pulling, but that didn't help the nose-heavy feeling.
As I learned what I was doing (and listened to others here), I decided to configure ballast like a teeter-totter, adding weight far back to lighten the front axle. I like the results.
Here's a recent post with a picture of added ballast I put on for a day of hauling gravel:
Link
Its hard to see in that picture but there are pier blocks chained on top of the box blade. Set up that way, the tractor steered well with a bucket of gravel and didn't slip on wet grass. For less extreme loads the BB is enough.
I think the blade and weights you described should work well for ballast.